Help With Killer Script?

local Player = game.Players.LocalPlayer
local p = Player.CharacterAdded:wait()

local p = game.Players.LocalPlayer.Character


local Player = game.Players.LocalPlayer
local Mouse = Player:GetMouse()

Mouse.KeyDown:connect(function(Key)
    if Key == 'l' then
    if game.Players.LocalPlayer.MO.Value == "Fire" then
    local Part = Instance.new("Part")
    local Fire = Instance.new("Fire", Part)
    Fire.Size = 1
    Fire.Heat = 1
        Part.Shape = "Ball"
        Part.BrickColor = BrickColor.new("Really red")
        Part.Size = Vector3.new(1,1,1)
        Part.Parent = game.Workspace
        Part.Position = p.Torso.Position + p.Torso.CFrame.lookVector*5 
        Part.Velocity = p.Torso.CFrame.lookVector*5  * 40 + Vector3.new(0,40,0)
        Part.BottomSurface = "Smooth"
        Part.TopSurface = "Smooth"
        wait(5)
        Part:Destroy()
        Part.Touched:connect(function(hit)
        local humanoid = hit.Parent:FindFirstChild("Humanoid")
        if humanoid ~= nil then
        humanoid.Health = 0
        end
end)
        end
end
end)

Towards the bottom of the script, there's a function that takes the player to 0 health when touching one of the spawned fireballs. This is in a local script and it gives no Output error. Someone help?